13212220040 has 16 divisors (see below), whose sum is σ = 29727495180. Its totient is φ = 5284888000.

The previous prime is 13212220039. The next prime is 13212220051. The reversal of 13212220040 is 4002221231.

It can be written as a sum of positive squares in 2 ways, for example, as 13113456196 + 98763844 = 114514^2 + 9938^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165152711 + ... + 165152790.

Almost surely, 2^13212220040 is an apocalyptic number.

13212220040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13212220040 is an abundant number, since it is smaller than the sum of its proper divisors (16515275140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13212220040 is a wasteful number, since it uses less digits than its factorization.

13212220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330305512 (or 330305508 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 13212220040 its reverse (4002221231), we get a palindrome (17214441271).

The spelling of 13212220040 in words is "thirteen billion, two hundred twelve million, two hundred twenty thousand, forty".